Question

Giúp em vs mn( giải câu cuối thôi ạ, đề dưới cmt)

Answer 1

  

Answer 2

  

Answer 3

1:

1: \(=3\sqrt{3}-12\sqrt{3}+10\sqrt{3}=\sqrt{3}\)

2: \(=6\sqrt{2}+10\sqrt{2}-35\sqrt{2}=-19\sqrt{2}\)

3: \(=4\sqrt{2a}+15\sqrt{2a}-5\sqrt{2a}=14\sqrt{2a}\)

4: \(=7\sqrt{a}-8\sqrt{a}+5\sqrt{a}=4\sqrt{a}\)

5: \(=\sqrt{a}\cdot\dfrac{\sqrt{2}}{2}-\sqrt{a}\cdot\dfrac{\sqrt{3}}{3}+3\sqrt{3}\cdot\sqrt{a}-2\sqrt{2}\cdot\sqrt{a}\)

\(=\sqrt{a}\cdot\left(-\dfrac{3}{2}\sqrt{2}+\dfrac{8\sqrt{3}}{3}\right)\)